| 碱性水溶液中亚砷酸硫化过程的热力学 |
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| 引用本文： | 徐志峰,张雪凯,赵洪兴.碱性水溶液中亚砷酸硫化过程的热力学[J].有色金属(冶炼部分),2016(7):5-8. |
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| 作者姓名： | 徐志峰 张雪凯 赵洪兴 |
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| 作者单位： | 江西理工大学冶金与化学工程学院,江西理工大学冶金与化学工程学院,江西理工大学冶金与化学工程学院 |
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| 基金项目： | 江西省自然科学基金项目（20122BAB20602）；江西省主要学科学术和技术带头人培养计划（20142BCB22005）；江西省“赣鄱英才555 工程”青年拔尖人才培养计划（赣组字2013[58]文） |
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| 摘 要： | 为优化高碱条件下硫代亚砷酸萃取工艺,研究碱性水溶液中亚砷酸硫化过程热力学。基于已有的热力学数据,绘制了298K条件下As~(III)-S-H_2O系各种As~(III)离子随pH及S/As摩尔比变化的浓度曲线,分别讨论了pH和硫化剂加入量对亚砷酸硫化过程的影响以及硫化反应产物形态。结果表明,在碱性介质中,亚砷酸硫化反应在热力学上是可行的。在高碱条件下,亚砷酸硫化反应可能受抑,通过提高硫化剂用量,可强化硫化过程。
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| 关 键 词： | 碱性溶液 亚砷酸 硫代亚砷酸 硫化反应 热力学 |
| 收稿时间： | 2016/2/18 0:00:00 |
| 修稿时间： | 2016/2/22 0:00:00 |
Thermodynamics of Sulfidation of Arsenite in Alkaline Solutions |
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| XU Zhifeng,Zhang Xuekai and Zhao Hongxing.Thermodynamics of Sulfidation of Arsenite in Alkaline Solutions[J].Nonferrous Metals(Extractive Metallurgy),2016(7):5-8. |
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| Authors: | XU Zhifeng Zhang Xuekai and Zhao Hongxing |
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| Affiliation: | School of Metallurgical and Chemical Engineering, Jiangxi University of Science and Technology,, |
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| Abstract: | Thermodynamics of arsenite sulfidation in alkaline solutions were investigated to optimize solvent extraction process of thioarsenite under high-alkalinity condition. The concentration curves of AsIII ions are determined with changes of pH values and S/As molar ratio based on the known thermodynamic data. Furthermore, the effects of pH and sulfidizing agent dosage on sulfidation and products morphology are discussed respectively. The results show that though feasible in thermodynamics, sulfidation process is probably inhibited due to high alkalinity. Increase of sulfidizing agent dosage can effectively promote sulfidation process. |
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| Keywords: | alkaline solution arsenite thioarsenite sulfidation thermodynamics |
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